399795266 has 8 divisors (see below), whose sum is σ = 645823164. Its totient is φ = 184520880.

The previous prime is 399795259. The next prime is 399795287. The reversal of 399795266 is 662597993.

It can be written as a sum of positive squares in 2 ways, for example, as 386319025 + 13476241 = 19655^2 + 3671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×399795266³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7688345 + ... + 7688396.

Almost surely, 2^399795266 is an apocalyptic number.

399795266 is a deficient number, since it is larger than the sum of its proper divisors (246027898).

399795266 is a wasteful number, since it uses less digits than its factorization.

399795266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15376756.

The product of its digits is 5511240, while the sum is 56.

The square root of 399795266 is about 19994.8809948947. The cubic root of 399795266 is about 736.6805705240.

The spelling of 399795266 in words is "three hundred ninety-nine million, seven hundred ninety-five thousand, two hundred sixty-six".